"Obsession" was the 47th episode of Star Trek: The Original Series.

References[edit | edit source]

Characters[edit | edit source]

Episode characters[edit | edit source]

BardoliChristine ChapelPavel ChekovDikironium cloud creatureStephen GarrovickBill HadleyJames T. KirkRyan LeslieLeonard McCoyRizzoMontgomery ScottSpockSwensonNyota UhuraVinci (?)

Novelization characters[edit | edit source]

BardoliChristine ChapelDikironium cloud creatureDavid GarrovickJames T. KirkLeonard McCoyRizzoMontgomery ScottSpockSwansonNyota Uhura

Starships and vehicles[edit | edit source]

USS Enterprise (Constitution-class heavy cruiser)
Referenced only 
USS Farragut (Constitution-class heavy cruiser)

Locations[edit | edit source]

Argus XTycho IV

Races and cultures[edit | edit source]

HumanVulcanDikironium cloud creature

Science and classification[edit | edit source]

anatomylifeformlogicmattermemoryorbitquadrantraces and culturesspacestarstardatetechnologyuniverseweapon

Technology and weapons[edit | edit source]


Materials and substances[edit | edit source]


Lifeforms[edit | edit source]

humanoidDikironium cloud creature

States and organizations[edit | edit source]


Ranks and titles[edit | edit source]

captaincommandercommanding officercommunications officerFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerlieutenant commanderofficerscientistscience officer

Other references[edit | edit source]

armbootclothingFederation membersfingerfive-year missiongovernmenthumanoidlanguagenation-statepantsrankStarfleet uniformStarfleet uniform (2260s)titletunicuniform

Appendices[edit | edit source]

Related media[edit | edit source]

Adaptations[edit | edit source]

Video releases[edit | edit source]

Background[edit | edit source]

According to actor Eddie Paskey, Lieutenant Leslie must have been "miraculously" revived in an unseen scene, which explains why he's seen again in future episodes, alive and well. However, no such scene exists in the revised final draft script.

Images[edit | edit source]

Connections[edit | edit source]

Timeline[edit | edit source]

published order
Previous episode:
The Gamesters of Triskelion
TOS episode produced Next episode:
The Immunity Syndrome
Previous episode:
The Deadly Years
TOS episode aired Next episode:
Wolf in the Fold
Previous story:
That Which Survives
Star Trek 9
Next story:
The Return of the Archons
chronological order
Previous Adventure:
Beneath the Skin
pages 20-21
Memory Beta Chronology Next Adventure:
Treaty's Law
chapters 1-24
Previous Adventure:
The Gamesters of Triskelion
Pocket Next Adventure:
Treaty's Law
chapters 1-24
Previous Adventure:
The Gamesters of Triskelion
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
The Patrian Transgression

External links[edit | edit source]

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